I was JUST writing about this. in 1966 the book Life Everlasting – In Freedom of the Sons of God which pointed to 1975. So then (and this is just how things go) over the next 9 years there is a slow and steady growth to the "implied" end of the world. And in 9 years, people can get pretty f'n panicky. Now, this is the 60's to 70's and there were a LOT of cults floating around, so it was easy to snag people into this snowball effect of impending doom.
The point is, the closer it got to 1975, the seasoned witnesses were ready to go and the new one entered the religion with rushed desperation. witness were out knocking on doors like crazy... everywhere. 'save as many people as you can'. everyone was in a frenzy and some people took it to extremes. that's to be expected, of course, but the society allowed people to take it to extremes, and that's what is really sad about the situation.
-James